參數(shù)資料
型號(hào): AD7650ACPZRL
廠商: Analog Devices Inc
文件頁(yè)數(shù): 3/20頁(yè)
文件大?。?/td> 0K
描述: IC ADC 16BIT CMOS 5V 48LFCSP
標(biāo)準(zhǔn)包裝: 2,500
位數(shù): 16
采樣率(每秒): 570k
數(shù)據(jù)接口: 串行,并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 77mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 48-VFQFN 裸露焊盤(pán),CSP
供應(yīng)商設(shè)備封裝: 48-LFCSP-VQ(7x7)
包裝: 帶卷 (TR)
輸入數(shù)目和類(lèi)型: 1 個(gè)偽差分,單極
配用: EVAL-AD7650CBZ-ND - BOARD EVALUATION FOR AD7650
REV. 0
–11–
AD7650
Transfer Functions
Using the OB/
2C digital input, the AD7650 offers two output
codings: straight binary and two’s complement. The LSB size is
VREF /65536, which is about 38.15
V. The ideal transfer char-
acteristic for the AD7650 is shown in Figure 4 and Table I.
000...000
000...001
000...010
111...101
111...110
111...111
ADC
CODE
Straight
Binary
ANALOG INPUT
VREF – 1.5 LSB
VREF – 1 LSB
1 LSB
0V
0.5 LSB
1 LSB = V REF/65536
Figure 4. ADC Ideal Transfer Function
Table I. Output Codes and Ideal Input Voltages
Digital Output Code (Hex)
Analog
Straight
Two’s
Description
Input
Binary
Complement
FSR – 1 LSB
2.499962 V
FFFF
1
7FFF
1
FSR – 2 LSB
2.499923 V
FFFE
7FFE
Midscale + 1 LSB
1.250038 V
8001
0001
Midscale
1.25 V
8000
0000
Midscale – 1 LSB
1.249962 V
7FFF
FFFF
–FSR + 1 LSB
38
V
0001
8001
–FSR
0 V
0000
2
8000
2
NOTES
1This is also the code for overrange analog input (V
IN+ – VIN– above VREF – VREFGND).
2This is also the code for underrange analog input (V
IN+ below VIN–).
NOTES
1. THE ADR421 IS RECOMMENDED WITH CREF = 47 F.
2. THE AD8021 IS RECOMMENDED WITH A COMPENSATION CAPACITOR CC = 10pF, TYPE CERAMIC NPO.
3. OPTIONAL LOW JITTER
CNVST.
AD7650
2.5V REF
NOTE 1
NOTE 2
U1
D
NOTE 3
CLOCK
C/ P/DSP
SERIAL
PORT
DIGITAL SUPPLY
(3.3V OR 5V)
DVDD
100nF
+
10 F
100nF
+
10 F
100
100nF
+
10 F
ANALOG
SUPPLY
(5V)
+
CREF1
1 F
4.7nF
CC
15
ANALOG INPUT
(0V TO 2.5V)
PD
RESET
CS
RD
IMPULSE
WARP
SER/
PAR
OB/
2C
CNVST
BUSY
SDOUT
SCLK
IN–
IN+
REFGND
REF
AGND
AVDD
DGND
DVDD
OVDD
OGND
Figure 5. Typical Connection Diagram
TYPICAL CONNECTION DIAGRAM
Figure 5 shows a typical connection diagram for the AD7650.
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